Elastically Deformable Fluid Filter Indicator Mechanism
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Solution Overview
Problem
There is a lack of reliable methods to ensure proper compression of fluid filters, such as oil filters, during installation, which can lead to either over-tightening and damage or under-tightening, causing leaks and engine damage due to the uncertainty in determining the correct axial advancement.
Innovation Solution
A trigger structure with a flexible mechanism that provides a tactile or audible indication when sufficient compression is reached, using bi-stable materials that emit a sound or vibration when a predetermined force or distance of axial compression is achieved, eliminating the need for torque devices and ensuring consistent compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter is tightened by hand or measured torque is applied, then the filter can be secured to the mounting base, but it is uncertain how far to advance the filter to achieve proper compression without over-tightening or under-tightening
Solution Approach 1:
The filter installation system uses a self-indicating mechanism where the filter housing itself provides visual feedback through alignment features (ridges and grooves) that automatically indicate when proper compression is achieved. The system serves itself by using the installation process to trigger the indication without requiring external measurement tools or complex torque devices.
Solution Approach 2:
The patent employs visual indicators that change appearance based on compression state. Alignment features such as ridges and grooves become visually aligned or misaligned depending on the degree of compression, providing immediate visual feedback to the installer about whether proper installation has been achieved.
2Reliability
If torque limiting devices or clutch mechanisms are used, then the filter can be protected from over-tightening damage, but these devices require special tools and are inexact
Solution Approach 1:
The patent extracts the indication function from complex torque-limiting devices and implements it directly in the filter housing structure itself. By using integrated alignment features and visual indicators, the system removes the need for separate torque wrenches, clutch mechanisms, or specialized installation tools, achieving protection and guidance through the filter's own structure.
Solution Approach 2:
The alignment features are simple, inexpensive structural elements molded into the filter housing that provide reliable indication without requiring expensive, precision-engineered torque-limiting devices. These features are designed to be used once during installation and then serve their purpose without needing maintenance or calibration.
3Reliability
If the filter is advanced axially to achieve seal compression, then proper sealing can be achieved, but there is no tangible indication that sufficient compression has been reached
Solution Approach 1:
The patent uses visual alignment of structural features (ridges, grooves, or other markings) on the filter housing that become aligned or misaligned based on the degree of axial compression. This provides immediate, tangible visual feedback to the installer about whether the seal has been properly compressed without requiring measurement tools.
Solution Approach 2:
The patent describes embodiments where the filter housing or mounting base includes features that produce audible clicks, pops, or vibrations when proper compression is achieved. This mechanical feedback provides tactile and auditory confirmation that the seal has been adequately compressed, making the compression level detectable without instruments.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides a tangible indication of proper filter installation, preventing damage from over- or under-compression, ensuring the filter is securely attached without the need for torque tools, and facilitating easier installation in various applications.
Implementation Method 1
the material undergoes elastic deformation, but that deformation may also be nonlinear as compared to the applied force
Implementation Method 2
The mechanism by which the structure creates the indication is referred to as snap-through buckling. This is a phenomenon that occurs on loading of a structure sufficiently to deform it from a stable configuration past a tripping point
Data Source
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AI summary
An apparatus having a threaded bottom assembly for interfacing to connect the bottom assembly to a second structure with threads, having a deformable element that, when sufficient force is applied via the process of threading the bottom assembly to the second structure, and at an appropriate value of axial compression or pressure, passes from a stable state, through a rapid shape transformation to a second state via a regime of reduced resistance to deformation, creating a tactile or audible indication that the apparatus has been properly installed. The deformable element may be joined to the apparatus using a circumferential ring by friction fit or spring fit, and may adhere magnetically to the second structure to facilitation installation.